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排序方式: 共有398条查询结果,搜索用时 15 毫秒
101.
Okumura Yutaka Matsuoka Hiromi Arakawa Hisayuki Tokanai Fuyuki Suzuki Atsushi Irizuki Toshiaki Kajita Hiroto Hara Motoyuki 《Fisheries Science》2021,87(1):121-130
Fisheries Science - Two sediment cores were collected from two sites in Nagatsura-Ura Lagoon, the mouth of which was destroyed in the 2011 Tohoku-oki tsunami. Although sediment conditions differed... 相似文献
102.
Teshima T Hara Y Takekoshi S Teramoto A Osamura RY Tagawa M 《Domestic animal endocrinology》2009,36(1):3-12
Cushing's disease caused by pituitary corticotroph adenoma is a common endocrine disease in dogs. A characteristic biochemical feature of corticotroph adenomas is their relative resistance to negative feedback by glucocorticoids. In this study, we examined gene expression related to adrenocorticotropic hormone (ACTH) production and secretion, and the negative feedback by glucocorticoids in canine corticotroph adenoma. We used resected corticotroph adenomas from 10 dogs with Cushing's disease. In order to investigate the alteration of gene expression between corticotroph adenoma and normal corticotrophic cells, ACTH-positive cells in the anterior lobe were microdissected using a laser-capture microdissection system, and mRNA levels of proopiomelanocortin (POMC), corticotropin releasing hormone receptor 1 (CRHR1), glucocorticoid receptor (GR), mineralocorticoid receptor (MR), and 11 beta hydroxysteroid dehydrogenase (11HSD) type 1 and type 2 were determined using real-time RT-PCR. POMC, CRHR1, and 11HSD2 mRNA levels in corticotroph adenoma were greater than those in normal corticotrophic cells (POMC, 5.5-fold; CRHR1, 4.9-fold; 11HSD2, 4.2-fold, P<0.01, respectively). MR and 11HSD1 mRNA levels in corticotroph adenoma were lower than those in normal corticotrophic cells (MR, 2.2-fold; 11HSD1, 2.9-fold, P<0.01, respectively). GR mRNA levels did not differ between corticotroph adenoma and normal corticotrophic cells. Our results may help to understand the increased ACTH production and the resistance to negative feedback suppression by glucocorticoids in canine corticotroph adenomas. These changes in gene expression may have a role in the growth of canine corticotroph adenoma, and help elucidate the pathophysiology of dogs with Cushing's disease. 相似文献
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105.
Takashi Kobayashi Eiji Kanda Shigeo Naito Toshihiko Nakajima Ichiro Arakawa Kazutoshi Nemoto Masanao Honma Hiroyuki Toujyou Kiyoshi Ishiguro Katsuki Kitada Yoichi Torigoe 《Journal of General Plant Pathology》2003,69(1):17-22
Rice reflectance was measured to determine the spectral regions most sensitive to leaf blast infection with a multispectral
radiometer. As disease severity increased, reflectance also increased in the 400–500 nm (blue), 570–700 nm (red), and 900–2000 nm
regions but decreased in the 500–570 nm and 700–900 nm regions. The increased reflectance in the blue and red regions may
be attributed to decreased chlorophyll and carotenoid contents in response to the blast infection. The maximum and minimum
reflectance differences occurred at 680 nm and 760 nm for the nondiseased and diseased rice, respectively. The spectral location
of maximum sensitivity was 675 nm regardless of disease severity. Rice reflectance ratios were evaluated as indicators of
leaf blast severity. Two ratios, R550/R675 (reflectance at 550 nm divided by reflectance at 675 nm), and R570/R675 quantified
the significant disease severity. These wavelengths were selected based on the sensitivity minima and maxima. The ratios of
nondiseased rice plants varied depending on growth stage. The variation in ratios must be considered when they are used to
estimate leaf blast severity.
Received: April 2, 2002 / Accepted: August 12, 2002 相似文献
106.
We previously developed insertion-deletion (InDel) markers that distinguish three genotypes (two homozygous and one heterozygous) of diverse citrus cultivars. These InDel markers were codominant and could be clearly detected by using simple agarose gel electrophoresis. We sought to establish a method for cultivar identification using these 28 InDel markers to genotype 31 citrus cultivars. The results revealed that a minimum of 6 markers were required to identify individuals using the three-genotype classification method. Furthermore, we found that a simple method for distinguishing between two genotypes (homozygous and heterozygous) could be used to identify individuals using a minimum of 7 markers. Our findings provide a basis for the development of simple and rapid citrus cultivar identification methods. 相似文献
107.
Fukuda Toshiyuki Sato Yuichi Takiguchi Mako Yamamoto Takahiro Murasawa Hiroyasu Pawlak Akiko Kobayashi Hiroyuki Tamano Haruna Takeda Atsushi 《Plant foods for human nutrition (Dordrecht, Netherlands)》2020,75(2):279-282
Plant Foods for Human Nutrition - Amyloid β (Aβ) peptides produced from the amyloid precursor protein, a transmembrane protein, are neurotoxic and blocking the neurotoxicity may lead to... 相似文献
108.
Takao Morita Kaoru Banshoya Takahiro Tsutsumoto Yasuhide Murase 《Journal of Wood Science》1999,45(6):463-469
Continuous milling tests with diamond-coated and uncoated cemented carbide tools and polycrystalline diamond tools were carried out on air-dried and wet melapi (Shorea sp.) and western redcedar (Thuja plicata D. Don). These tools were examined for corrosive-wear characteristics of the tool-edge appearance, cutting-edge profile, edge recession, and cutting-power consumption. The tool surfaces were observed with a scanning electron microscope and were analyzed by energy-dispersive X-ray spectroscopy. Based on these examinations, the occurrence of corrosive wear while cutting wet woods was confirmed for the uncoated and polycrystalline diamond tools. In contrast, the coated tools did not exhibit corrosive wear, nor did delamitation or wear of the diamond film occur with any of the work materials. The diamond-coated tools showed high resistance not only to mechanical wear but also to corrosive wear.The results of this work were presented at the 48th annual meeting of the Japan Wood Research Society, Shizuoka, April 1998 相似文献
109.
本研究揭示了柔嫩艾美耳球虫感染可以引起鸡肠炎沙门氏菌感染的复发。复发的主要表现为盲肠内容物的肠炎沙门氏菌阳性率和数量再次显著地升高;肠炎沙门氏菌在盲肠中的滞留时间显著延长。这种复发与肠炎沙门氏菌的初始感染量及球虫感染时间有关。肝脏和脾脏阳性率无显著变化。 相似文献
110.
Fifteen farmed yellowtail Seriola quinqueradiata were randomly selected from sea cages. Five fish were slaughtered instantly by cutting the spinal bulb (control group). The
remaining ten fish were left for 20 min in a narrow net and then they were slaughtered by cutting the spinal bulb instantly.
These ten fish were bled in two water tanks. In one tank, the water was aerated (ventilation group), while the other tank
was not aerated (burnt group). The ATP ratio in the control group (83.8 ± 4.1%) was higher than the ventilation group (37.2 ± 22.1%)
and the burnt group (5.8 ± 6.0%) at 3 h after slaughter. The K value of the burnt group increased remarkably at 3 h after slaughter, and was significantly higher than those for the other
groups. The ventilation group showed a recovery in available energy for physiological maintenance to the same level as the
control group during bleeding, as well as a significantly slowed loss of muscular firmness compared to the burnt group. This
study shows that the yellowtail continued to respire and take up oxygen until complete physiological death, and elevated oxygen
levels during bleeding slowed the postmortem changes and suppressed the occurrence of burnt meat. 相似文献